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From mac fang <mac.had...@gmail.com>
Subject Need help, About one issue on NameNode & DataNode.
Date Sun, 02 Jan 2011 12:26:49 GMT
Hi, guys,

Since i am quite new in using the Hadoop, currently i face one problem about
the NameNode HA. Below is the case

1. We are using Hadoop 0.21
2. We manage about 1 NameNode, 1 Backup node and 100 datanodes

Current issue:
if the namenode crashed, it switched to the backup node. However we had to
restart all 100 datanode. This cost us about 5-10 mins to restart all
DataNodes.

Any suggestion to resolve this, perhaps we can avoid restarting the
datanoes, how to?


Thanks in advanced.

regards
macf

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